EP4315622A1 - Configuration de détection de défaillance de faisceau dans des réseaux de communication cellulaire - Google Patents

Configuration de détection de défaillance de faisceau dans des réseaux de communication cellulaire

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Publication number
EP4315622A1
EP4315622A1 EP21716722.0A EP21716722A EP4315622A1 EP 4315622 A1 EP4315622 A1 EP 4315622A1 EP 21716722 A EP21716722 A EP 21716722A EP 4315622 A1 EP4315622 A1 EP 4315622A1
Authority
EP
European Patent Office
Prior art keywords
user equipment
tci
tci state
reference signal
bfd
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21716722.0A
Other languages
German (de)
English (en)
Inventor
Keeth Saliya Jayasinghe LADDU
Timo Koskela
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Technologies Oy
Original Assignee
Nokia Technologies Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Technologies Oy filed Critical Nokia Technologies Oy
Publication of EP4315622A1 publication Critical patent/EP4315622A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal

Definitions

  • FIELD [0001] Various example embodiments relate in general to cellular communication networks and more specifically, to configuration of beam failure detection in such networks.
  • Beam failure detection may refer to a set of functionalities that can be used to enhance operation of beam-based wireless communication systems. Beam failure detection may be used for example in various cellular communication networks, such as, in cellular communication networks operating according to 5G radio access technology. 5G radio access technology may also be referred to as New Radio, NR, access technology. 3rd Generation Partnership Project, 3GPP, develops standards for 5G/NR and one of the topics in the 3GPP discussions is related to beam failure detection. According to the discussions, there is a need to provide improved methods, apparatuses and computer programs related to beam detection. Such improvements may be used in other suitable cellular communication networks as well.
  • a method comprising, determining, by a user equipment, that the user equipment is configured or activated with at least two Transmission Configuration Indication, TCI, states for one control resource set, with at least two linked search space sets and one TCI state for each of the linked search space sets or with at least two TCI states for Physical Downlink Shared Channel, PDSCH, reception, wherein the at least two TCI states comprise a first TCI state and a second TCI state, determining, by the user equipment, that a downlink reference signal indicated by the first TCI state is to be included to a first set of Beam Failure Detection, BFD, resources and a downlink reference signal indicated by the second TCI state is to be included to a second set of BFD resources and including, by the user equipment, the downlink reference signal indicated by the first TCI state to the first set of BFD resources and the downlink reference signal indicated by the second TCI state to the second set of BFD resources.
  • the method may be performed by the user equipment
  • Embodiments of the first aspect may comprise at least one feature from the following bulleted list or any combination of the following features:
  • said another TCI codepoint is a second lowest TCI codepoint that indicates the at least two TCI states; • determining, by the user equipment, that the user equipment is configured or activated with the two linked search space sets, determining, by the user equipment, associated TCI states corresponding to the two linked search space sets, wherein each search space set is associated with a control resource set, determining, by the user equipment, that the downlink reference signal indicated by the TCI state of the control resource set corresponds to a lower search space set identity or control resource set identity among linked search space sets and is to be included in the first set of BFD resource and determining, by the user equipment, that the downlink reference signal indicated by the TCI state of the control resource set corresponds to a higher search space set identity or control resource set identity among linked search space sets and is to be included in the second set of BFD resources;
  • an apparatus comprising at least one processing core, at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processing core, cause the apparatus at least to, determine, by a user equipment, that the user equipment is configured or activated with at least two Transmission
  • TCI states for one control resource set, with at least two linked search space sets and one TCI state for each of linked search space sets or with at least two
  • the apparatus of the second aspect may be a user equipment or a control device configured to control the functioning thereof, possibly when installed therein.
  • the at least one memory and the computer program code may be further configured to, with the at least one processing core, cause the apparatus at least to perform the method of the first aspect.
  • an apparatus comprising means for determining, by a user equipment, that the user equipment is configured or activated with at least two Transmission Configuration Indication, TCI, states for one control resource set, with at least two linked search space sets and one TCI state for each of the linked search space sets or with at least two TCI states for Physical Downlink Shared Channel, PDSCH, reception, wherein the at least two TCI states comprise a first TCI state and a second TCI state, means for determining, by the user equipment, that a downlink reference signal indicated by the first TCI state is to be included to a first set of Beam Failure Detection, BFD, resources and a downlink reference signal indicated by the second TCI state is to be included to a second set of BFD resources and means for including, by the user equipment, the downlink reference signal indicated by the first TCI state to the first set of BFD resources and the downlink reference signal indicated by the second TCI state to the second set of BFD resources.
  • TCI Transmission Configuration Indication
  • BFD Beam Failure Detect
  • non- transitory computer readable medium having stored thereon a set of computer readable instructions that, when executed by at least one processor, cause an apparatus to at least perform the method of the first aspect.
  • a computer program comprising instructions which, when the program is executed by an apparatus, cause the apparatus to carry out the method of the first aspect.
  • FIGURE 1 illustrates an exemplary network scenario in accordance with at least some embodiments
  • FIGURE 2 illustrates a process in accordance with at least some embodiments
  • FIGURE 3 illustrates an example apparatus capable of supporting at least some embodiments.
  • FIGURE 4 illustrates a flow graph of a method in accordance with at least some embodiments.
  • FIGURE 1 illustrates an exemplary network scenario in accordance with at least some embodiments.
  • a beam-based wireless communication system which comprises User Equipment, UE, 110, at least two Base Stations, BSs, 120, and core network element 130.
  • UE 110 may be connected to BS 120 via air interface using beams 115.
  • BS 120 may be a network entity that configures some or all control information of UE 110 and allocates resources for UE 110.
  • BS 120 may refer to a Transmission and Reception Point, TRP, or comprise multiple TRPs that may be co-located or non-co-located. That is, FIGURE 1 demonstrates a multi-TRP, mTRP, scenario when BSs 120 are considered as TRPs.
  • UE 110 may comprise, for example, a smartphone, a cellular phone, a Machine-to-Machine, M2M, node, Machine-Type Communications, MTC, node, an Internet of Things, IoT, node, a car telemetry unit, a laptop computer, a tablet computer or, indeed, another kind of suitable wireless terminal.
  • UE 110 may communicate wirelessly with a cell of BS 120 via at least one beam 115.
  • BS 120 may be considered as a serving BS for UE 110 and the cell of BS 120 may be a serving cell for UE 110.
  • Air interface between UE 110 and BS 120 may be configured in accordance with a
  • Radio Access Technology which both UE 110 and base station 120 are configured to support.
  • Examples of cellular RATs include Long Term Evolution, LTE, New Radio, NR, which may also be known as fifth generation, 5G, radio access technology and MulteFire.
  • LTE Long Term Evolution
  • NR New Radio
  • 5G fifth generation
  • MulteFire fifth generation
  • BS 120 may be referred to as eNB while in the context of NR, BS 120 may be referred to as gNB.
  • embodiments of the present disclosure are not restricted to any particular wireless technology. Instead, embodiments may be exploited in any beam-based wireless communication system comprising multiple TRPs.
  • BS 120 may be connected, directly or via at least one intermediate node, with core network 130 via interface 125.
  • Core network 110 may be, in turn, coupled via interface 135 with another network (not shown in FIGURE 1), via which connectivity to further networks may be obtained, for example via a worldwide interconnection network.
  • BS 120 may be connected with at least one other BS as well via an inter-base station interface (not shown in FIGURE 1), even though in some embodiments the inter-base station interface may be absent.
  • BS 120 may be connected, directly or via at least one intermediate node, with core network 130 or with another core network.
  • the exemplary network scenario may comprise a relay instead of, or in addition to, UE 110 and/or BS 120. Relaying may be used for example when operating on millimeter-wave frequencies.
  • the relay may be an Integrated Access and Backhaul, IAB, node.
  • the IAB node may be referred to as a self-backhauling relay as well.
  • Another example of a relay may be an out-band relay.
  • the relay node may comprise two parts:
  • DU Distributed Unit, part which may facilitate functionalities of BS 120, such as a gNB.
  • the DU part of a relay may perform tasks of BS 120.
  • MT Mobile Termination, MT, part which may facilitate functionalities of a UE, i.e., a backhaul link which may be the communication link between a parent node (DU), such as a DU part of BS 120, and the relay, such as an IAB node.
  • DU parent node
  • the MT part may be referred to as a IAB-UE as well, i.e., the relay may correspond to a UE partly and perform tasks of UE 110.
  • Beam-based operation may be particularly useful at higher carrier frequencies (such as above 6 GHz), because UEs operating on such frequencies are typically equipped with one or multiple antenna arrays or antenna modules per digital input and both transmission and reception beam pattern per digital input are more narrow than omni directional beam pattern typically used at below 6 GHz. Nevertheless, example embodiments of the present disclosure may be applied in any beam-based wireless communication system, regardless of the used carrier frequency.
  • QCL indication functionality may be exploited for beam management.
  • Two antenna ports may be considered as QCL’ed if properties of a channel over which a symbol is transmitted via a first antenna port can be derived from a channel over which a symbol is transmitted via a second antenna port.
  • QCL indication functionality may be defined as follows. The principle to receive a certain physical signal or physical channel may be that UE 110 is either configured with or UE 110 implicitly determines a source/reference signal that UE 110 has received and measured earlier which defines how to set a RX beam of UE 110 (e.g. when QCL typeD is configured) for the reception of the downlink (target) physical signal or channel to be received.
  • TCI Transmission Configuration Indication
  • UE 110 may be configured with TCI state(s) to provide UE 110 with source Reference Signal(s), RS(s), for determining QCL characteristics.
  • TCI state may include for example one or two source RSs that provide UE QCL TypeA, TypeB, TypeC and/or TypeD parameters, e.g., as follows:
  • TCI states may be transmitted to UE 110 in a downlink control message for example, the downlink control message comprising configurations such as QCL- relationships between the Downlink, DL, RSs in one Channel State Information - Reference Signal, CSI-RS, set and the Physical Downlink Shared Channel, PDSCH, Demodulation Reference Signal, DMRS, ports.
  • UE 110 may be configured with multiple TCI state configurations and each TCI state may contain parameters for configuring a QCL relationship between one or two DL RSs.
  • the TCI state of a Control Resource Set, CORESET may be provided to UE 110 using Radio Resource Control, RRC, or Medium Access Control, MAC, signaling.
  • UE 110 may perform Beam Failure Detection, BFD, for one or more SCells that have been configured for BFD.
  • the BFD procedure is similar to release 15 PCell BFD, i.e., for each SCell configured for BFD, UE 110 may determine a set of BFD resources.
  • the set of BFD resources may be a set of BFD RSs, denoted by qO, which may be configured in implicit or explicit manner.
  • UE 110 may determine the BFD RSs based on the RS indicated by the active TCI states for Physical Downlink Control Channel, PDCCH, for a CORESET.
  • PDCCH Physical Downlink Control Channel
  • UE 110 performs BFD according to the RS configured by the network.
  • UE 110 may indicate the BFI to the higher layer.
  • a DL RS such as Synchronization Signal and Physical Broadcast Channel Block, SSB/CSI-RS in the set of qO (set of BFD resources) whether or not to indicate a Beam Failure Instance, BFI, to a higher layer (MAC/L2). If all of the BFD RSs in the set of qO are in failure condition, e.g., the hypothetical Physical Downlink Control Channel, PDCCH, Block Error Ratio, BLER, estimated on the RS is above a threshold value (Qout, e.g. 10%), UE 110 may indicate the BFI to the higher layer.
  • a threshold value e.g. 10%
  • the MAC layer may count, using a BFI counter, the BFI indications for each respective cell and if the MAC layer counts that the configured number of BFI instances indicated by the lower layer for the respective cell (PCell/SCell) is above a threshold, the MAC layer initiates/triggers BFR.
  • the BFI counter may be supervised by a BFD timer. That is, each time UE 110 receives a new BFI indication at the MAC layer, the BFD timer may be started and the BFI counter incremented. If the BFD timer expires, the BFI counter may be reset.
  • mTRP operation may refer to operation where UE 110 is served using one or more TRPs, such as BS 120 in FIGURE 1.
  • the mTRP operation may comprise Single Downlink Control Information, S-DCI, or multi Downlink Control Information, mDCI, operation.
  • a CORESETPoolIndex value may be used to group CORESETs under separate groups, i.e., when some Control Resource Sets, CORESETs, share the same group identity or CORESETPoolindex value, such CORESETs may be considered to be in the same group.
  • the different CORESETs are not grouped, i.e., the same CORESETpoolindex value may be configured for all the CORESETs.
  • each TRP is associated with a BFD-RS set.
  • the BFD-RS set may be CORESETPoolindex specific.
  • the CORESETPoolIndex may not be configured for UE 110 and hence, implicit configuration of multiple BFD-RS sets is not straightforward.
  • the explicit value may associate a DL RS indicated by an active TCI State for a CORESET to the respective set of qO.
  • RRC signalling any modification to the value with respect to the BFD-RS configuration would require higher layer signalling.
  • Embodiments of the present disclosure therefore enable configuration of BFD for mTRP scenarios when S-DCI is used, without requiring higher layer signalling.
  • FIGURE 2 illustrates a process in accordance with at least some embodiments.
  • UE 110 and BS 120 may be configured to operate in the mTRP scenario using S-DCI.
  • BS 120 may determine a BFD configuration for UE 110.
  • the configuration may be a configuration for the mTRP scenario when S-DCI is used.
  • said configuration may comprise a first TCI state and a second TCI state.
  • BS 120 may transmit the configuration to UE 110, for example in S-DCI.
  • configuration may refer to activation as well.
  • UE 110 may determine that it is configured/activated with more than one TCI State for a CORESET.
  • UE 110 may determine, at step 230, that it is configured/activated with at least two linked search space sets and one TCI state for each of the linked search space sets.
  • UE 110 may determine, at step 230, that it is configured/activated with at least two TCI states for PDSCH reception.
  • the at least two TCI states may comprise a first TCI state and a second TCI state.
  • UE 110 may assume or determine, at step 240, that the DL RS indicated by the first TCI State is to be included in a first set of qO, i.e., first set of BFD resources, and the second TCI State to a second set of qO, i.e., second set of BFD resources.
  • UE 110 may include the DL RS indicated by the first TCI state to the first set of BFD resources and the DL RS indicated by the second TCI state to the second set of BFD resources.
  • UE 110 may perform BFD by monitoring beams 115 in accordance with the first set and the second set.
  • CORESET beams may be used when more than one TCI state activated for CORESET (e.g., when S-DCI is sent on a PDCCH in a Single Frequency Network, SFN).
  • UE 110 may determine that it is configured/activated with more than one TCI State for a CORESET.
  • the first TCI state may be a state with a highest or a lowest index
  • the second TCI state may be a state with a second highest or a second lowest index, respectively.
  • UE 110 may assume or determine for both the QCL typeD (QCL type comprising spatial receiver parameters) RS to be included for respective sets. That is, UE 110 may assume or determine that the QCL typeD is to be included to the first and the second sets when at least two QCL source RSs are configured for at least two TCI states.
  • QCL typeD QCL type comprising spatial receiver parameters
  • UE 110 is configured/activated with the at least two TCI states for one
  • UE 110 may include for each of the CORESETs the DL RS indicated by the TCI States to respective sets of q. That is, UE 110 may determine that it is configured with at least two TCI states for each of at least two CORESETs and assume or determine that the DL RS indicated by the first TCI state is to be included to the first set of BFD resources of each of the at least two CORESETs and the DL RS indicated by the second TCI state is to be included to the second set of BFD resources of each of the at least two CORESETs.
  • UE 110 may determine the BFD-RS set inclusion based on a signalled order in a TCI state MAC Control Element, CE. For instance, the DL RS of the TCI State that is indicated first in the MAC CE may be included to the first set and the DL RS of the TCI state that is indicated second in the MAC CE may be included in the second set. That is, UE 110 may receive from BS 120 a first indication indicating that the downlink reference signal indicated by the first TCI state is to be included to the first set of BFD resources and a second indication indicating that the downlink reference signal indicated by the second TCI state is to be included to the second set of BFD resources. The first indication and the second indication may be received in the MAC CE.
  • UE 110 may assume or determine the implicit BFD-RS configuration/inclusion of the DL RS indicated by respective TCI states for different sets of qO, when more than one TCI State is activated for a CORESET and the DL RS have different QCL source RSs, i.e., different SSBs.
  • UE 110 may assume or determine the implicit BFD-RS configuration/inclusion of the DL RS indicated by respective TCI states for different sets of qO, when more than one TCI State is activated for a CORESET and the DL RS have different QCL source RS types (typeD) That is, in general UE 110 may assume or determine that the DL RS indicated by the first TCI state is to be included to the first set of BFD resources and the DL RS indicated by the second TCI state is to be included to the second set of BFD resources when the DL RSs have different source reference signals, such as different SSBs or different types.
  • typeD QCL source RS types
  • UE 110 may perform BFD per respective sets of BFD-RS. That is, UE 110 may perform BFD procedure based on the respective sets of BFD- RS.
  • the BFD monitoring at the MAC layer may use the same parameters, such as the BFD timer and/or BFI counter, for each of the monitored sets or the parameters may be individually/independently configured per BFD procedure.
  • UE 110 may monitor air interface for BFD using same parameters for the first and the second set or it may determine to use the individually configured parameters.
  • the lower layers may indicate to the MAC layer that 2 different indications are provided (and indications may be monitored using respective counters per indication or the indication may be jointly counted).
  • the MAC layer may implicitly determine such operation if it receives TCI State activation MAC CE containing activation for 2 TCI States for a CORESET.
  • the BFD may be preconfigured (e.g.
  • BFD monitoring may be preconfigured) and the second set of values/procedure activated when at least one BFD-RS is included in the second set of qO.
  • the multiple BFD-RS set based BFD monitoring may be configured by network and UE 110 may determine the BFD-RS to be included in the respective sets according to the methods described herein.
  • the implicit BFD-RS configuration may be a configurable parameter and configured per Bandwidth Part, BWP, for example. That is, UE 110 may receive a configuration configuring the user equipment to assume or determine that the DL RS indicated by the first TCI state is to be included to the first set of BFD resources and the DL RS indicated by the second TCI state is to be included to the second set of BFD resources.
  • the BFD (and inclusion of RS to respective sets of BFD-RSs) may be configured per BWP, e.g., for BWP1 UE 110 may assume or determine this operation and for BWP2 UE 110 may assume or determine that this operation is not used.
  • network may configure UE 110, whether UE 110 is required/should determine to include RS to multiple sets of qO (BFD-RS set) perform BFD.
  • the implicit BFD-RS configuration for multiple sets may be configurable and when UE 110 is not configured to include BFD-RS to multiple sets, UE 110 may include both, the first and the second DL RSs indicated by the active TCI states, to the same set of qO.
  • the first and the second DL RSs may be included to the same set if the maximum number of BFD-RS is not exceeded by the activation of the at least two TCI States for a CORESET (e.g. two TCI States are activated for only one CORESET).
  • UE 110 may determine to include the RS with lower/higher value of TCI State ID to the set or UE 110 may add the DL-RS indicated by the TCI State (until the maximum number is reached) according to ascending/descending order of the TCI State ID or based on the order of the TCI State activation in a MAC CE or MAC CEs configuring/activating the TCI States. That is, UE 110 may determine that a configuration for multiple sets of BFD resource is possible for UE 110, but UE 110 is not configured to include the first and the second DL RSs to said multiple sets. Then UE 110 may include the first and the second DL RSs to the first set or to the second set or include the RS to the set according to rules herein.
  • each CORESET for each CORESET at least one of the DL RS indicated by the TCI State may be included to the set of BFD-RSs so that the total maximum number of DL RSs indicated by the active TCI States does not exceed the maximum number of BFD-RS per set of qO.
  • UE 110 may include at least one DL RS to the set of BFD-RS per each CORESET.
  • UE 110 may determine to include the DL RS indicated by the lowest TCI State index or the first TCI State indicated in the MAC CE to the set of qO.
  • UE 110 may assume or determine a candidate beam RS (ql) for a respective set of qO, such as the first or the second set, to be indicated from:
  • • candidates may be explicitly provided by network (i.e. sets of ql can be provided by the network, such as by BS 120).
  • UE 110 may determine to include the DL RS to the first set of qO. UE 110 may also remove the previously indicated RS from the second set. That is, UE 110 may determine, after being configured with the at least two TCI states, that it is configured with one TCI state for the CORESET and remove the DL RS indicated by the second TCI state from the second set of BFD resources. UE 110 may maintain the first and the second sets of qO as long as at least one of the CORESETs is activated with two TCI States.
  • UE 110 may include to the set of (respective) qO the RS index configured with qcl-Type set to 'typeD' for the corresponding TCI states.
  • UE 110 may determine to include the one with qcl-typeD (spatial RX ) to the set of qO.
  • PDSCH beams may be used with S-DCI in the mTRP scenario.
  • UE 110 may be activated with PDSCH reception with more than one TCI states, for example in case of S-DCI M-TRP scheme, and receive a MAC-CE activating TCI codepoints where some of the codepoints have two TCI states activated.
  • UE 110 may then assume or determine that the DL RS indicated by the first TCI State of a lowest TCI codepoint having two TCI states is to be included to the first set of qO and a second TCI State of the same, lowest codepoint is to be included to the second set.
  • UE 110 may assume or determine that the DL RS indicated by the first TCI state of the lowest TCI codepoint is to be included to the first set of BFD resources and the DL RS indicated by the second TCI state of the lowest TCI codepoint is to be included to the second set of BFD resources. If a maximum of two BFD-RSs is configured for a set of qO for each TRP, UE 110 may further assume or determine the DL RS indicated by the first TCI State of a second lowest TCI codepoint having two TCI states to be included in the first set of qO and the second TCI State of the same codepoint to the second set.
  • the TRP may comprise of one or more TRPs (e.g. a set of TRPs) each providing one more RS and one or CORESETs.
  • UE 110 may determine the BFD-RS set inclusion based on a signalled order in a TCI state MAC CE. That is., UE 110 may assume or determine that the DL RS of the TCI State indicated first in the TCI state MAC CE is to be included to the first set and the DL RS of the TCI State indicated second in the MAC CE is to be included in the second set.
  • CORESET beams may be used when linked search space sets (CORESETs) are provided (e.g., PDCCH repetition, non-SFN).
  • CORESETs linked search space sets
  • UE 110 may be activated with one TCI state for a CORESET and each search space set may be associated with a different CORESET.
  • Search space sets may be linked via various ways such as RRC signalling, MAC CE. Monitoring occasions for linked search space sets may also be linked.
  • UE 110 may assume or determine the DL RS indicated by the TCI State of the CORESET corresponds to a lower search space set identity or CORESET identity among said linked search space sets and is to be included to the first set of qO. In addition, UE 110 may assume or determine that the DL RS indicated by the TCI State of the CORESET corresponds to a higher search space set identity or CORESET identity among linked search space sets and is to be included to the second set.
  • UE 110 may assume that the DL RS indicated by the first TCI State of a lowest TCI codepoint having two TCI states is to be included to the first set of qO and a second TCI State of the same, lowest codepoint is to be included to the second set. That is, UE 110 may assume or determine that the DL RS indicated by the first TCI state of the lowest TCI codepoint is to be included to the first set of BFD resources and the DL RS indicated by the second TCI state of the lowest TCI codepoint is to be included to the second set of BFD resources.
  • UE 110 may determine the BFD-RS set inclusion based on a signalled order in a TCI state MAC CE used for PDSCH, i..e., UE 110 may assume or determine that the DL RS of the TCI state indicated first in the MAC CE is to be included to the first set and the DL RS of the TCI State indicated second in the MAC CE is to be included in the second set.
  • inter-cell candidates beam indices may be configured to be SSBs of respective cells.
  • UE 110 may, at step 250, include the DL RSs to the sets accordingly and then perform BFD using the first and the second sets at step 260.
  • FIGURE 3 illustrates an example apparatus capable of supporting at least some embodiments. Illustrated is device 300, which may comprise, for example, UE 110, BS 120 or a control device configured to control the functioning thereof, possibly when installed therein.
  • processor 310 which may comprise, for example, a single- or multi-core processor wherein a single-core processor comprises one processing core and a multi-core processor comprises more than one processing core.
  • Processor 310 may comprise, in general, a control device.
  • Processor 310 may comprise more than one processor.
  • Processor 310 may be a control device.
  • a processing core may comprise, for example, a Cortex-A8 processing core manufactured by ARM Holdings or a Steamroller processing core produced by Advanced Micro Devices Corporation.
  • Processor 310 may comprise at least one Qualcomm Snapdragon and/or Intel Atom processor.
  • Processor 310 may comprise at least one application-specific integrated circuit, ASIC.
  • Processor 310 may comprise at least one field-programmable gate array, FPGA.
  • Processor 310 may be means for performing method steps in device 300.
  • Processor 310 may be configured, at least in part by computer instructions, to perform actions.
  • a processor may comprise circuitry, or be constituted as circuitry or circuitries, the circuitry or circuitries being configured to perform phases of methods in accordance with embodiments described herein.
  • circuitry may refer to one or more or all of the following: (a) hardware-only circuit implementations, such as implementations in only analog and/or digital circuitry, and (b) combinations of hardware circuits and software, such as, as applicable: (i) a combination of analog and/or digital hardware circuit(s) with software/firmware and (ii) any portions of hardware processor(s) with software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and (c) hardware circuit(s) and or processor(s), such as a microprocessor(s) or a portion of a microprocessor(s), that requires software (e.g., firmware) for operation, but the software may not be present when it is not needed for operation.
  • firmware firmware
  • circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and/or firmware.
  • circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.
  • Device 300 may comprise memory 320.
  • Memory 320 may comprise random- access memory and/or permanent memory.
  • Memory 320 may comprise at least one RAM chip.
  • Memory 320 may comprise solid-state, magnetic, optical and/or holographic memory, for example.
  • Memory 320 may be at least in part accessible to processor 310.
  • Memory 320 may be at least in part comprised in processor 310.
  • Memory 320 may be means for storing information.
  • Memory 320 may comprise computer instructions that processor 310 is configured to execute. When computer instructions configured to cause processor 310 to perform certain actions are stored in memory 320, and device 300 overall is configured to run under the direction of processor 310 using computer instructions from memory 320, processor 310 and/or its at least one processing core may be considered to be configured to perform said certain actions.
  • Memory 320 may be at least in part comprised in processor 310.
  • Memory 320 may be at least in part external to device 300 but accessible to device 300.
  • Device 300 may comprise a transmitter 330.
  • Device 300 may comprise a receiver 340.
  • Transmitter 330 and receiver 340 may be configured to transmit and receive, respectively, information in accordance with at least one cellular or non-cellular standard.
  • Transmitter 330 may comprise more than one transmitter.
  • Receiver 340 may comprise more than one receiver.
  • Transmitter 330 and/or receiver 340 may be configured to operate in accordance with Global System for Mobile communication, GSM, Wideband Code Division Multiple Access, WCDMA, Long Term Evolution, LTE, and/or 5G/NR standards, for example.
  • GSM Global System for Mobile communication
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolution
  • 5G/NR 5G/NR
  • Device 300 may comprise a Near-Field Communication, NFC, transceiver 350.
  • NFC transceiver 350 may support at least one NFC technology, such as Bluetooth, Wibree or similar technologies.
  • Device 300 may comprise User Interface, UI, 360.
  • UI 360 may comprise at least one of a display, a keyboard, a touchscreen, a vibrator arranged to signal to a user by causing device 300 to vibrate, a speaker and a microphone.
  • a user may be able to operate device 300 via UI 360, for example to accept incoming telephone calls, to originate telephone calls or video calls, to browse the Internet, to manage digital files stored in memory 320 or on a cloud accessible via transmitter 330 and receiver 340, or via NFC transceiver 350, and/or to play games.
  • Device 300 may comprise or be arranged to accept a user identity module 370.
  • User identity module 370 may comprise, for example, a Subscriber Identity Module, SIM, card installable in device 300.
  • a user identity module 370 may comprise information identifying a subscription of a user of device 300.
  • a user identity module 370 may comprise cryptographic information usable to verify the identity of a user of device 300 and/or to facilitate encryption of communicated information and billing of the user of device 300 for communication effected via device 300.
  • Processor 310 may be furnished with a transmitter arranged to output information from processor 310, via electrical leads internal to device 300, to other devices comprised in device 300.
  • a transmitter may comprise a serial bus transmitter arranged to, for example, output information via at least one electrical lead to memory 320 for storage therein.
  • the transmitter may comprise a parallel bus transmitter.
  • processor 310 may comprise a receiver arranged to receive information in processor 310, via electrical leads internal to device 300, from other devices comprised in device 300.
  • Such a receiver may comprise a serial bus receiver arranged to, for example, receive information via at least one electrical lead from receiver 340 for processing in processor 310.
  • the receiver may comprise a parallel bus receiver.
  • Device 300 may comprise further devices not illustrated in FIGURE 3.
  • device 300 may comprise at least one digital camera.
  • Some devices 300 may comprise a back-facing camera and a front-facing camera, wherein the back-facing camera may be intended for digital photography and the front- facing camera for video telephony.
  • Device 300 may comprise a fingerprint sensor arranged to authenticate, at least in part, a user of device 300.
  • device 300 lacks at least one device described above.
  • some devices 300 may lack a NFC transceiver 350 and/or user identity module 370.
  • Processor 310, memory 320, transmitter 330, receiver 340, NFC transceiver 350, UI 360 and/or user identity module 370 may be interconnected by electrical leads internal to device 300 in a multitude of different ways.
  • each of the aforementioned devices may be separately connected to a master bus internal to device 300, to allow for the devices to exchange information.
  • this is only one example and depending on the embodiment various ways of interconnecting at least two of the aforementioned devices may be selected without departing from the scope of the embodiments.
  • FIGURE 4 is a flow graph of a method in accordance with at least some embodiments.
  • the phases of the illustrated method may be performed by UE 110 or by a control device configured to control the functioning thereof, possibly when installed therein.
  • UE 110 may be a MT part of a relay.
  • UE 110 may be configured to operate in a mTRP scenario using S-DCI.
  • the method may comprise, at step 410, determining, by UE 110, that UE 110 is configured or activated with at least two TCI states for one CORESET, with at least two linked search space sets and one TCI state for each of the linked search space sets or with at least two TCI states for PDSCH reception, wherein the at least two TCI states comprise a first TCI state and a second TCI state.
  • the method may also comprise, at step 420, determining, by UE 110, that a DL RS indicated by the first TCI state is to be included to a first set of BFD resources and a DL RS indicated by the second TCI state is to be included to a second set of BFD resources.
  • the method may include, at step 430, including, by UE 110, the DL RS indicated by the first TCI state to the first set of BFD resources and the downlink reference signal indicated by the second TCI state to the second set of BFD resources.
  • an apparatus such as, for example, UE 110, BS 120, or a control device configured to control the functioning thereof, possibly when installed therein, may comprise means for carrying out the embodiments described above and any combination thereof.
  • a computer program may be configured to cause a method in accordance with the embodiments described above and any combination thereof.
  • a computer program product embodied on a non-transitory computer readable medium, may be configured to control a processor to perform a process comprising the embodiments described above and any combination thereof.
  • an apparatus such as, for example, UE 110, BS 120, or a control device configured to control the functioning thereof, possibly when installed therein may comprise at least one processor, and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to perform the embodiments described above and any combination thereof.
  • At least some embodiments find industrial application in cellular communication networks, for example in 3GPP networks, wherein beamforming is used.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon un aspect donné à titre d'exemple, la présente divulgation concerne un procédé consistant à : déterminer, au moyen d'un équipement utilisateur, que l'équipement utilisateur est configuré ou activé avec au moins deux états d'indication de configuration de transmission (TCI) pour un ensemble de ressources de commande, avec au moins deux ensembles d'espaces de recherche liés et un état TCI pour chacun des ensembles d'espaces de recherche liés ou avec au moins deux états TCI pour une réception de canal partagé de liaison descendante physique (PDSCH), les au moins deux états TCI comprenant un premier état TCI et un second état TCI ; déterminer, au moyen de l'équipement utilisateur, qu'un signal de référence de liaison descendante indiqué par le premier état TCI doit être inclus dans un premier ensemble de ressources de détection de défaillance de faisceau (BFD) et qu'un signal de référence de liaison descendante indiqué par le second état TCI doit être inclus dans un second ensemble de ressources BFD, puis inclure, au moyen de l'équipement utilisateur, le signal de référence de liaison descendante indiqué par le premier état TCI dans le premier ensemble de ressources BFD et le signal de référence de liaison descendante indiqué par le second état TCI dans le second ensemble de ressources BFD.
EP21716722.0A 2021-04-01 2021-04-01 Configuration de détection de défaillance de faisceau dans des réseaux de communication cellulaire Pending EP4315622A1 (fr)

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KR20220044598A (ko) * 2019-08-16 2022-04-08 콘비다 와이어리스, 엘엘씨 다중-trp 및 다중-패널 송신을 이용한 빔 실패 검출 및 복구

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